Nurotroy

Yes, there may be some undesirable effects associated with Nurotroy such as acne, acne-rosacea (redness of the face) and some allergic reactions.

Yes, the spontaneous pain, tingling, burning and itching associated with neck pain alleviates with the use of the Nurotroy. 

Nurotroy is an active form of vitamin B12. It is available in the form of oral, parenteral, and sublingual (under the tongue) formulations. It is used to treat B12 deficiency, Alzheimer's disease, diabetic neuropathy (nerve damage due to diabetes), visual function, rheumatoid arthritis, Bell's Palsy (facial paralysis or temporary weakness of the facial muscles), sleep-wake rhythm (irregular sleeping pattern) disorder and neuropathic pain.

Nurotroy works by forming myelin sheath which is used to cover and protect the nerve cells. Nurotroy is used to revive the nerve cells. In the absence of enough Nurotroy, myeline sheath doesn't form properly leading to nerve damage.

Methylcobalamin is abundantly found in eggs, milk, curd, meat (chicken and fish). However, if your levels are very low you are recommended to take medicines as per doctors instructions.